I have a DF70 Suzuki 4 stroke, it is quiet, good on gas, and has the long warranty. It is heavy, and the bottom end punch isn't what one would hope for. Right now I am testing the warranty as it has the early engine problem (for DF60/70 Suzuki's) of a broken oil pump drive, and has been down for two weeks, no end in sight yet. Figures it would fail during time off... One thing I have noted is that the 4 strokes have big alternators compared to the two strokes, with the notable exception of the Evinrude Ficht engines. Not all things are equal either, the 140 Suzuki is lighter then the 115? Go figure...